Hydraulic operator



March 5, 1935. w. O. I UM HYDRAULIC OPERATOR Filed Deo. 19, 1929 IFI!!! Il I-Iis AttQ-frjeg.

Patented Mar. 5, 1935 umm ' mais.

` Newmarkl tigmu* My inventionr'elates to improvements in Claims.

No. 193.0515; `fue'd May 2o,1"927,fand assigned-to "5 the Vsame assigneel as this applicationw ynoids, and to -`In devices oi the hy aulic operated: type now in use the lack'bfa compact unitl results in Wieldy apparatus notvreadily placed to operate fthe devices to b e actuated thereby. The lack of a compact unit prohibits the use ot such devices where space is of prime importance, `although such hydraulic devices are highly de sirable.

'I'he lack of relative movement-of the hydraulic l y a fluid pressure operated device in thei'orm of v vided with a relatively mounting permitting other than straight linev movement between the operator and the device worked upon.

iis.

a compact unit which is ate a given device. t Y y A further object oi' my invention is' the provision of al compact electro-hydraulic unit promovable two-point readily applied to 4actu- Another object oi' my.- invention is the -provision of a combined piston .and impellerdora `hydraulic operator. v

llurther objects will appear hereinafter. f/

-. base, and slidably.mounted on the other end -a vwork engaging member provided with an eye fork ,n pivoted engagement lwith-'a device worked upon.

The interior of the casing islled with Iliquid and provided with a piston which carries an impeller pump. .The impelleris provided with an electrical driving means. i I

The piston is provided with communicating passages therethrough so that the liquid can be pumped into that part of the cylinder below the piston to raise the piston, or be permitted to elec-; tro-hydraulic pressure operati-ngv -meansj-such .as-.1i ldescribed in my copending application 'SerialiA to a brake;

. Inthe preferred embodiment of my inventionfja slotsuch las 141.y vva ,casing in the form or a cylinder"vertica1ly .mounted is provided. onone end of l*which is ...placed aneye for pivoted attachment to. someis? raised and lowered die piston the bfPistOn connected' to chey pistozfareens 'wnin extend through the casing and .carry a.jmeniber 5 provided: withgmea' f or engaging'Ethelt object or ber is"moved"- up "and Piston movementmy iA peculiar constrcti down 1n 'frespome'fjrto the on., the casinglreeps the 10 `oil fromy discharging over 'the'outside' ofthe casing; during 'the' energization of the. operatbr.

,My "invention `=wi11 be better: yfrom thev following' description when? considered in claims.

In the accompanying "draw-ing,v

fFig. -'represents a cross sectioriffof v`the hydraulic oprator inA its position of rest;

section 'with' the pistonv in avraised 3 showsthe method-fof: attaching Fig. 4" a'fdetailed showingfof the piston.

'I In Fig. 1 the casing by the numeral 1. 'A'

2 is mounted on the toppi' ports an 'electric motor l'3 means of the `cup-shaped peller 5 'is mounted Iin' afpis'tonL lfwhi in the cylinder 1.)" When actuated,fth'

the openingsV I1o; 1oz` '91- and" sjnd fa li'g. 'f2 representsa cross 20 pgsition; Fis. the'operator cir cylinder fis designated 25 coveringo'rl)cylinder` head the c singandsupwhich fis" covred by member "4 y and discharges the oill inf:I al'iradial dirtion through the orifices 11 114; tnfe'reby pressure in the oil below the pisto upon the upper partp'l tensions12',"1v2 which tensions13. 13'.*. .These xextensituisf=sli`de2` the the cylinder head 2 to bearings. 14,i14f,feach..pf whichjfigrprgvgdedwitn 4o .Clearances are 'provided in pez'r'nit the" extensions or touching'thesame. 'Tubu-larf u and 24-l are provided on extensionsr4 limit the upward' tri-.wel` o f fthe'iiiistoh, Across onsisand member. 16 pivotally supports the'ca'sing.

" PoWerj-is supplied to 50 the jirnpeller'y 5 by means of the splined shaft 17'which is rotatably mounted in the piston and-Supported by the bearing 18.

y The bearingf"18 in aligning type so that Figs. l and 2 isfof the selfshould any -misalignment 55 peiled through the orifices 11, 11'.

the upper portion of theimpeller 5 and is ex- I'he bearings 14, 14 'act a8 rods 18, 13'. However, oil therodslsandu'willreturntothe which is above the bearings 14, 14' because of ftheclearance in the Vcover around the exten sions.- The oil which is thereJ received will then return to the .oil reservoir by means ofthe slot 141.1, t

"The-operation'of' the device is as follows:

when lu: -isdesired to raise me werk einher-fis, the meter a is energized te rotate' l'the shaft 17 which in turn drives the impeller 5. The liquid within the casing enters the lpox'- tion of the piston 6 in which the impeller is located through the ays 10,10', 8, 8' and 9, as heretofore described and explained, and is discharged in a radial direction through passages 11, 1I. Thisycauses a pressure differential with the pressure exerting a force upon the bottomofthepistontocauseittoberaised within the cylinder, the rate at which the pistonisraiseddependingupontheareaofthe piston, the load lifted thereby, the impeller diameter and thcrate of rotation of the motor.

- To permit the piston to return to its lower posiy tion, the motor 3 is deenergized. The oil then `flows backwards from the underside of the piston through the passageways to the other side of the piston. A dash-pot effect is obtained by this action, so that the-piston settles easily.

Fig. 3 shows an application of the hydraulic operator to abrake mechanism. In the particulan'showing, the 'brake is biased to the .-on positionby means of the vspring 21. The

` 'lever;2 2, which ispivoted at thepoint 23, is

I f Vconnected to.

` the work engagingV 'eye ,member y11i. Itwi be seen that upon operation of the hydraulic operator to raise.the Vmember 16, the

leverf22'will operate agair'istl the spring 21 to f release thbrake.

ne" application, however, 1s net eonnned te ,i .brakesbut may Vbe applied-.to such devices as clutches, doors,y win'dow openers. spot welders and pumps and 'fullls vthe functions of solenoid and air cylinders.

It'will be apparent that the invention is susceptible of beinginodied to meet difierent conditions encountered in its` use and Iv t t therefore aim to cover by the appended claims all modi- A flcations lwithin the true spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. A fluid pressure device including a fluid containing cylinder, a piston for .the cylinder( having passages extending through the piston and forming a centrifugal pump housing therein with the inlets and outlets on opposite sidesV of the piston, and an impeller rotatably mounted in said housing for creating a pressure difieren-- tial between the opposite sides of the piston for having a plurality of interconnected passages extending through the piston and forming a A double inlet centrifugal pump housing withinthe piston with the inlets and outlets on opposite sides of the piston, and an impeller rotatably mounted in the said housing for creating a pressure differential between. the opponte sides oftheplstlformovingthesame.

3. A device for applying pressure comprising a duid cylinder, a two-part piston therein formlngahousingbetweensaidpartaandanimpeller carried by the piston in said housing for creating a pressure differential between the two sides of the piston for moving the same.

4. A device for applying pressure comprising a duid cylinder, a two-part piston therein having one part provided with pressure applying means and another part cooperating therewith to vform a housing therebetween, an impeller carried; by said piston within said. housing and larranged yto create a pressure differential between the two sides of the piston for moving the same, and an electric motor for driving the impeller. l

5. A device for applying pressure comprising a huid-cylinder, a two-part piston therein having one part provided with pressure applying means and another part cooperating therewith to form a housing therebetween, an impeller disposed in said housing and rotatably mounted therein, and a bearing for said impeller mounted in one of said parts, said impeller being arranged to create a pressure dierential between the two sides of the piston for moving the same and :neans for driving the impeller.

6. In combination, a duid container, a liquid therein, a piston immersed in said liquid and movable in said container in response to a pressure-differential in said liquid, an impeller for creating a pressure differential in said liquid for moving said piston, said piston having a pump housing as a part thereof and carrying. said impeller therein and having communicating passages extending through said piston whereby liquid may be forced therethrough from one side of said piston'to the other side by said impeller, means supported by -said piston; and extending through said container for supporting a work member, said last named means being forming a pump vhousing therebetween with communicating passagesextending through said parts to permit the passageof fluid through said piston and housing from one side thereof to the other and an electric motor driven impeller carried by said piston withinsaid'housing for creating a pressure differential to operate said piston. 8. In combinations. pivoted load member and an electro-hydraulic mechanism for operating the load member including a fluid containing cylinder mounted for pivotal movement, a piston reciprocating in the cylinder and having a pressure applying member extending from the cylinder and pivotully connected with said load memaacaeis 3 ber, and an electric; motor driven centrifugal pump mounted in the cylinder for transferring fluid from one side of the piston to the other to create aA fluid pressure differential on the opposite sides of the piston for operating said load member.

9. In combination, a casing mounted vertically, a liquid insaid casing, a piston immersed in said casing and movable therein in response to a pressure dierexitialy in said liquid, an impeller pump carried by said 'piston for creating a pressure diierentialin said liquidr drivingv means for said-pump mounted on said casing, means connectng said impeller pump and drive ing means, and a self-adjusting bearing carried by said piston for supporting said connecting'A means Ywithout subjecting any part of the apparatus to strain due to any misalignment oi said connection during operation thereof.

10. 'In combination, a casing provided on one 'end with a pivot and a driving means mounted on the other end and having a hollow shaft, liquid within said casing, a piston, an impeller mounted in said piston and surrounded by said liquid, a splined shaft carried by said impeller cooperating with said hollow shaft and telescoping therein, said impeller actuated by said driving means to create a pressure differential in said liquid to move said piston.

11. In an electro-hydraulic operator unit, a cylinder, a liquid therein, a piston reciprocable in said cylinder and an impeller carried by said piston for creating a pressure dinerential in said liquid tomove said piston, a motor for driving said impeller and provided with a hollow shaft, a splined shaft cooperating therewith and telescoping therein.' said splined shaft connected to said impeller to drive the same.

12. In a vertical hydraulic operator unit a casing, a liquid therein, a pressure responsive device immersed in said liquid and movable therein in response to pressure diilerential in said liquid, a pressure creating means mounted in said pressure responsive device for creating a pressure differential in said liquid, a driving means for said pressure creating means connected thereto and mounted on top of said casing, means mounted on said pressure responsive device extending upwardly fromy said cylinder and movable into and out of said casing and supporting a work engaging member, and stops on said last means which act to limit the upward movement of said last means out of the casing upon movement of said piston.

13. A pressure operated device comprising a liquid container, a liquid therein, a pressure responsive means immersed in said liquid and a pressure creating element mounted in said means for. creating a pressure differential to move said means .in said casing, said means being constructed to permit the liquid to pass therethrough from one side of said means and come into contact with said element on both sides thereof and to be expelled from said element to the other side of said means to create a pressure differential in said liquid to move said means.

14. In a pressure operated device, a casing, a liquid within said casing, a pressure responsive element immersed in said ligtiidfand movable in said casing, an impeller mounted in said element, said element being constructed to rotatably support said impeller and provided with communicating means permitting said liquid to come into contact with both sides of said in:H

peller from one vside of said element and other communicating means in said' element to 'permit said liquid to vbe discharged from 'said impeller to the other side of said element-'said liquid being forced by said impeller to viowvthrough said communicating means in said element from one side of said element to the other vto create a pressure differential in said liquid to move said element. A

15. In combination, ya casing', a4 liquid therein,

a pressure responsive device immersedjin said liquid'and movable in-said casing" and apressure creating means mounted in said device for creating a pressure differential in said 'liquid to move said device, a driving means, and a sliding connection between said drivingmeans and said pressure creating means, to drive vsaid last means, and a self-adjusting canied by said pressure responsive device for supporting said connection without subjecting any part of the apparatus to strain due to ent of said connection during operation thereof.

16. In combination, a casing, a liquid in said casing, a pressure responsive device immersed in said liquid and movablel in said Sins in response to a pressure differential created in said liquid, a pressure creating means for creating said pressure differential', means mounted on said device extending upwardly--from said casing and supporting a work engaging member., and bearings for said last means'which act as wipers to remove the liquid from said last means as said means move ,into and out of the casing upon movement of said pressure responsive device, and a chamber between said casing and one end of said bearing surrounding said last means into which liquid from said last means may drain, and a slot cut into said bearing permitting said liquid to drain back into the liquid in said casing from said chamber.

17. In combination, a casing mounted vertically provided with a pivotal mounting on the lower end of said casing, a liquid in said casing, a piston immersed in said liquid and movable in said casing in response to a pressure differential in said liquid, a pump carried by said piston for creating a pressure diiferential in said liquid, and communicating means extending through said piston whereby the liquid maybe forced therethrough from one side of the piston to the other by said pump, and a driving means for said pump and' connected thereto mounted on the top of said casing and rods mounted on said piston and movable therewith extending from said casing and supporting` a .work engaging member to move the sam 18. In combination, a lvertically mounted cas-k ing, a liquid therein, a piston reciprocable in said casing and carrying an'impeller pump for creating a pressure differential in said liquid to move said piston, a motor mounted on said casing for driving said pump, connections between said pump and said driving means, means mounted on said piston and carried therewith extending through said casing, and a work engaging member supported by said last means, the means mounted upon said piston moving into and out of said casing with said piston in response to a pressure differential created by said pump upon operation of said motor.

19. In combination, a load member and an electro-hydraulic mechanism for operating said load member including a pivotally mounted casing, a driving means mounted thereon opposite4 to the pivotal mounting of said casing, a liquid I. andV an'electrQ-l'iydraulic meohanism for oper-at member including a' pivoting means for creating. a pressure in said liquid for moving said piston to apply pressure to said load member. i 'y 20. In'combination,"a pivoted load member -appiied to said pivoted ally mounted, a liquid therein, a reciprocable piston therein and movable in response to pressure within said liquid, rods carried by said piston in spaced relation and extending through said casing opposite to the pivotal mounting thereof, a work engaging member carried by outer ends of said rods provided with a pivot for engaging said load member, and pressure creating means for creating a pressure in said liquid to move said piston to increase the distance between said pivoted end and the pivoted load engaging member whereby a pressure is load member.

WALTER O. LUM. 

